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01-02-2018 | Uitgave 5/2018 Open Access

Quality of Life Research 5/2018

The impact of extended half-life versus conventional factor product on hemophilia caregiver burden

Quality of Life Research > Uitgave 5/2018
Carolyn E. Schwartz, Victoria E. Powell, Jun Su, Jie Zhang, Adi Eldar-Lissai



Extended half-life factor products have reduced annualized bleeding rates in hemophilia patients. The impact of extended half-life versus conventional factor products on hemophilia caregiver burden has not been investigated. This study aimed to evaluate caregiver burden in extended half-life versus conventional factor products for hemophilia A and B.


This cross-sectional web-based study of caregivers of people with hemophilia A or B was recruited from a panel research company and by word of mouth. Participants completed the Hemophilia Caregiver Impact measure, the PedsQL Family Impact Module (PedsQL), and the Work Productivity and Activity Impairment Questionnaire (WPAI). We also collected demographic, insurance coverage, and medical information related to the hemophilia patient(s). Burden differences were assessed using linear regression and matched cohort analyses.


The sample (n = 448) included 49 people who were caring for people on extended half-life factor products. Worse caregiver burden was associated with more infusions per week and more bleeds in the past 6 months. Regression analyses suggested that caring for someone who is on a extended half-life factor product is associated with lower emotional impact (β = − 0.11, p < 0.05, Adjusted R2 = 0.06), and shows a trend association with lower practical impact (β = − 0.09, p < 0.10, Adjusted R2 = 0.05). The matched cohort analysis also revealed that people on extended half-life factor product had lower Emotional Impact and Practical Impact scores (t = − 2.95 and − 2.94, respectively, p < 0.05 in both cases). No differences were detected on the PedsQL or the WPAI.


The reduced required frequency of factor product infusions of extended half-life factor products appears to reduce the emotional distress and practical burden of caregiving. Future work should evaluate the longitudinal impact.

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